﻿<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script src="js/jquery-1.4.2.js" type="text/javascript">
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</head>
<body>
<input type="text" id="txt" />
<input type="button" id="btn" value="点击" onclick="$('#txt').val('hello');"/>
</body>
</html>
